KR101628669B1 - Accelerating hardening device for coating silica - Google Patents

Accelerating hardening device for coating silica Download PDF

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Publication number
KR101628669B1
KR101628669B1 KR1020150182761A KR20150182761A KR101628669B1 KR 101628669 B1 KR101628669 B1 KR 101628669B1 KR 1020150182761 A KR1020150182761 A KR 1020150182761A KR 20150182761 A KR20150182761 A KR 20150182761A KR 101628669 B1 KR101628669 B1 KR 101628669B1
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South Korea
Prior art keywords
hollow tube
diameter
fixing member
circumferential surface
reinforcing bar
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KR1020150182761A
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Korean (ko)
Inventor
박기태
이상윤
서동우
유영준
김희주
김지영
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한국건설기술연구원
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C9/00—Apparatus or plant for applying liquid or other fluent material to surfaces by means not covered by any preceding group, or in which the means of applying the liquid or other fluent material is not important
    • B05C9/08—Apparatus or plant for applying liquid or other fluent material to surfaces by means not covered by any preceding group, or in which the means of applying the liquid or other fluent material is not important for applying liquid or other fluent material and performing an auxiliary operation
    • B05C9/14—Apparatus or plant for applying liquid or other fluent material to surfaces by means not covered by any preceding group, or in which the means of applying the liquid or other fluent material is not important for applying liquid or other fluent material and performing an auxiliary operation the auxiliary operation involving heating or cooling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C9/00—Apparatus or plant for applying liquid or other fluent material to surfaces by means not covered by any preceding group, or in which the means of applying the liquid or other fluent material is not important
    • B05C9/08—Apparatus or plant for applying liquid or other fluent material to surfaces by means not covered by any preceding group, or in which the means of applying the liquid or other fluent material is not important for applying liquid or other fluent material and performing an auxiliary operation
    • B05C9/12—Apparatus or plant for applying liquid or other fluent material to surfaces by means not covered by any preceding group, or in which the means of applying the liquid or other fluent material is not important for applying liquid or other fluent material and performing an auxiliary operation the auxiliary operation being performed after the application
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
    • B05D3/02—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by baking
    • B05D3/0254—After-treatment
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
    • B05D7/02—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to macromolecular substances, e.g. rubber
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
    • E04C5/07—Reinforcing elements of material other than metal, e.g. of glass, of plastics, or not exclusively made of metal
    • E04C5/073—Discrete reinforcing elements, e.g. fibres
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B3/00—Drying solid materials or objects by processes involving the application of heat
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B9/00—Machines or apparatus for drying solid materials or objects at rest or with only local agitation; Domestic airing cupboards
    • F26B9/003—Small self-contained devices, e.g. portable

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Microbiology (AREA)
  • Wood Science & Technology (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)

Abstract

The present invention relates to a hardening acceleration device for silica coating and an FRP reinforcing bar prepared by using the same. According to the present invention, multiple rolling portions are arranged in a hollow truncated cone-shaped guiding unit and an FRP reinforcing bar is inserted into the guiding unit, and thus silica (S) on an outer peripheral surface of the FRP reinforcing bar can be homogenized. In addition, a heat supply unit is mounted on an outer peripheral surface of the guiding unit so that a heat source is transferred to the rolling portion, and thus hardening of the silica (S) on the outer peripheral surface of the FRP reinforcing bar is accelerated. Furthermore, the guiding unit and the FRP reinforcing bar are rotated in opposite directions when the FRP reinforcing bar is inserted into the guiding unit, and thus homogenization and hardening performances of the silica (S) on the outer peripheral surface of the FRP reinforcing bar can be redoubled.

Description

{ACCELERATING HARDENING DEVICE FOR COATING SILICA}

More particularly, the present invention relates to a curing promoting device for silica sand coating for more effectively improving the adhesion performance of silica sand applied to a reinforcing bar made of fiber reinforced plastic (FRP reinforcing bar) The FRP reinforced bars are made of FRP.

In general, it is well known that reinforcing steel in concrete can not suffer severe corrosion due to various environmental factors.

In addition, severe rebar corrosion problems are experienced due to the effects of the barrier materials and seawater environment. In the case of existing reinforcing bars, serious corrosion can not be avoided under the chloride concrete environment even with epoxy coating.

In this way, when the rust is generated due to corrosion, the strength of the reinforcing bar is lowered and the durability of the building is lowered. In order to increase the durability and prolong the life of the building, do.

In addition, cracks and leaks occur in the building wall due to a decrease in elasticity and tensile force when the building is shaken in a high-rise building, and there is a problem in that installation, transportation and storage are inconvenient due to heavy weight during operation.

Therefore, in recent years, fiber reinforced plastic (FRP) has been actively developed as a semi-permanent new material that has excellent resistance to corrosion, heat resistance and corrosion resistance, and has a very high strength, .

These FRP reinforcement rods are very necessary for the construction of structures that are frequently contacted with water or frequent corrosion due to oxidation. For this purpose, a coating is applied on the outer circumferential surface of FRP reinforcing bars to prevent corrosion.

There are many kinds of materials used for coating, but generally silica (S) is used as a coating material. FRP reinforced bars made of fiberglass plastic are now commonly used in the process of sanding (S) coating in order to show the adhesion performance corresponding to the deformed bars.

An FRP rebar similar to that described above is shown in FIG. Fig. 1 shows a state in which silica sand (S) is coated on the outer peripheral surface of an FRP reinforcing bar 10 made of glass fiber reinforced plastic (GFRP).

This process is performed manually by applying silica sand (S) on a reinforcing bar coated with a resin (adhesive) and then fixing it by applying pressure with a hand. The FRP reinforcing bar (10) .

However, as shown in FIG. 1, it is difficult to ensure the uniformity of the silica sand (S) coating in the process of fixing the silica sand by the above-described conventional techniques.

In addition, the above-described conventional technique has a problem that it takes a long time to wait for curing of the resin by exposure to sunlight.

Korean Patent Publication No. 10-2010-0025660 filed on Aug. 28, 2008, entitled "Bending member for F-alpha rebar and method for constructing F- Korean Patent Application No. 10-2005-0082339 filed on February 18, 2004, entitled "Reinforcing members for concrete structures and methods for manufacturing the same"

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems occurring in the prior art, and it is an object of the present invention to provide a FRP reinforcing bar having a structure in which a plurality of rolling parts are arranged inside a hollow conical guide part, Which is capable of homogenizing silica sand (S), and an FRP reinforcing bar made using the same.

Another object of the present invention is to provide a curing accelerating device for silica sand coating which promotes the curing of the silica sand S on the outer circumferential surface of the FRP reinforcement rope by mounting the heat supply part on the outer circumferential surface of the guide part and transmitting the heat source to the rolling part, And to provide a manufactured FRP rebar.

Another object of the present invention is to improve the homogenization and curing performance of the silica sand S on the outer circumferential surface of the FRP reinforcing bar by rotating the guide portion and the FRP reinforcing bars in opposite directions when inserting the FRP reinforcing bars into the guide portion And to provide an FRP reinforcing bar made by using the curing promoting device.

According to an aspect of the present invention, there is provided a curing accelerator for coating silica sand according to the present invention, comprising: And a rolling part mounted in the guide part so as to be in parallel with the inner surface of the guide part, wherein the rolling part is made of a plurality of rolling parts and is arranged to be adjacent to each other and elastically presses the outer circumferential surface of the FRP reinforcing bar passing through the inside of the guide part, So as to homogenize the silica sand S coated on the outer circumferential surface of the FRP reinforcing bars.

Here, the guide portion is a truncated cone-shaped hollow tube having an empty interior, the hollow tube having an insertion end formed at one end of the hollow tube to insert the FRP reinforcing bar; And a discharge end portion formed at the other end of the hollow tube so as to face the insertion end portion, wherein the diameter of the insertion end portion is larger than the diameter of the discharge end portion.

Wherein the hollow tube comprises: a curved hollow tube inner circumferential surface extending from an inner diameter of the insertion end to an inner diameter of the discharge end; And a curved hollow tube outer circumferential surface extending from an outer diameter of the insertion end portion to an outer diameter of the discharge end portion.

Here, the rolling unit may include: a hollow first fixing member having a plurality of different diameters and arranged along the inner circumferential surface of the hollow tube; A second hollow fixing member disposed on the same line as the first fixing member and spaced apart from the first fixing member by a predetermined distance and having a different inner diameter; A first support member having a '' 'shape and a part of which is inserted into the first fixing member; A second support member having a '' 'shape and partially inserted into the second fixing member; And a roller which is inserted and rotated by one end of the first supporting member and one end of the second supporting member, wherein the first fixing member and the second fixing member are disposed perpendicular to the inner surface of the hollow tube .

Here, the roller and the first and second support members are made of a material having a high thermal conductivity, and the first and second fixing members are made of a material having a low thermal conductivity.

Here, the rolling part may include: a first spring located inside the first fixing member and supporting the other end of the first supporting member; And a second spring which is positioned inside the second fixing member and supports the other end of the second supporting member, wherein the first spring and the second spring are arranged such that the roller is in close contact with the outer circumferential surface of the FRP reinforcing bar And the roller is adapted to homogenize the silica sand S on the outer circumferential surface of the FRP reinforcing bar by providing an elastic force to the first and second support members.

The curing accelerating device for silica sand coating may further include: a heat radiating part mounted on an outer circumferential surface of the hollow tube; And a heat source connection unit electrically connecting the first and second support members to the heat supply unit, wherein the heat supply unit accelerates the curing of the sandblasted yarn S on the outer circumferential surface of the FRP reinforcing bars by applying a heat source to the rollers .

Here, the upper diameter of the first and second fixing members may be smaller than the lower diameter of the first and second fixing members.

Here, the diameter of the other end of the first and second support members is larger than the diameter of the central portion of the first and second support members.

Here, the corners of both ends of the roller are rounded in a curved shape.

Wherein the guide portion is opened at both sides; And a rolling part mounted in the guide part so as to be in parallel with the inner surface of the guide part, wherein the rolling part is made of a plurality of rolling parts and is arranged to be adjacent to each other and elastically presses the outer circumferential surface of the FRP reinforcing bar passing through the inside of the guide part, Wherein the rolling part of the curing accelerating device for coating silica sand is passed through an FRP reinforcing bar coated on the outer circumferential surface of the silica sand so that the silica sand is homogenized by using a curing accelerator for silica sand coating, The manufactured FRP rebar can be used.

According to the present invention, by inserting the FRP reinforcing bars into the inside of the guide portion in a structure in which a large number of rolling portions are arranged in the hollow truncated cone-shaped guide portion, the FRP reinforcing bars are brought into close contact with the FRP reinforcing bars by the variable movement of the rolling portions, It is possible to homogenize the silica sand S on the outer peripheral surface of the FRP reinforcing bar.

According to the present invention, the curing of the silica sand S on the outer peripheral surface of the FRP reinforcing bar can be promoted by mounting the heat supply unit on the outer circumferential surface of the guide unit and transmitting the heat source to the rolling unit.

According to the present invention, as both side edges of the rollers are rounded, the silica sand S on the outer circumferential surface of the FRP reinforcement can be prevented from being separated from the FRP reinforcement.

According to the present invention, when the FRP reinforcement bars are inserted into the guide portions, the guide portions and the FRP reinforcement bars are rotated in opposite directions to each other, thereby doubling the homogenization and curing performance of the silica sand S on the outer peripheral surface of the FRP reinforcement bars.

1 is a view showing an FRP reinforcing bar coated with silica sand S manually by a conventional technique.
2 is a view showing a curing accelerator for silica sand coating according to an embodiment of the present invention.
Fig. 3 is a view for explaining the engagement relationship between the discharge end and the roller in Fig. 2. Fig.
4 is a cross-sectional view taken along the line A-A 'in Fig.
5 (a) and 5 (b) are views for specifically explaining the area B in FIG.
6 is a view showing a state before the FRP reinforcement bars are inserted into the inside of the curing accelerating device for silica sand coating according to the embodiment of the present invention.
FIG. 7 is a view showing a state after the FRP reinforcement bars are inserted into the inside of the curing accelerating device for covering silica sand according to the embodiment of the present invention. FIG.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings, which will be readily apparent to those skilled in the art. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. In order to clearly illustrate the present invention, parts not related to the description are omitted, and similar parts are denoted by like reference characters throughout the specification.

Throughout the specification, when an element is referred to as "comprising ", it means that it can include other elements as well, without excluding other elements unless specifically stated otherwise.

2 to 7, a description will be made of a curing accelerator for silica sand coating.

[Curing accelerator for silica sand (100)]

FIG. 1 is a view showing an FRP reinforcing bar coated with silica sand S manually by a conventional technique, FIG. 2 is a view showing a curing accelerating device for silica sand coating according to an embodiment of the present invention, and FIG. 3 is a cross- 4 is a cross-sectional view taken along line A-A 'in Fig. 2, and Figs. 5 (a) and 5 (b) are cross- Fig. 6 is a view showing a state before the FRP reinforcement bars are inserted into the inside of the curing accelerating device for covering silica sand according to the embodiment of the present invention. Fig.

2 to 7, the curing accelerating apparatus 100 for silica sand coating according to the embodiment of the present invention may include a guide unit 110 and a rolling unit 120.

The guide portion 110 is hollow in which both sides are open. More specifically, the guide portion 110 is a hollow tube 111 having a hollow truncated cone shape as shown in Fig. 2 as a rotating body. The guide portion 110 may be made of a material having a high hardness or high rigidity such as a stainless steel pipe, a PVC pipe, a steel pipe pipe or the like in order to support the roller 120 for pressing the FRP reinforcing bar 10, Most preferred is plastic (GFRP: Glass Fiber Reinforced Plastics).

The hollow tube 111 may include an insertion end 111a, a discharge end 111b, a hollow tube inner circumferential surface 111c, and a hollow tube outer circumferential surface 111d.

6 and 7, the insertion end 111a is formed at one end of the hollow tube 111 to insert the FRP reinforcing bar 10, and the insertion end 111a is inserted into the hollow pipe 111, It corresponds to the entrance.

The discharge end 111b is formed at the other end of the hollow tube 111 so as to face the insertion end 111a. Specifically, the discharge end portion 111b has the same center point as the insertion end portion 111a, and only the diameters thereof are different from each other. That is, the diameter of the insertion end 111a is formed to be larger than the diameter of the discharge end 111b.

The discharge end 111b corresponds to an outlet through which the FRP rebar 10 inserted into the insertion end 111a is discharged to the outside, as shown in Figs. 6 and 7.

In other words, the inner diameter of the hollow tube 111 becomes narrower from the insertion end 111a to the discharge end 111b as the insertion end 111a and the discharge end 111b have different diameters. When the first FRP reinforcing bar 10 is inserted into the insertion end 111a of the FRP barrel 10, the rolling part 120 is subjected to a homogenizing operation of roughly pressurizing the silica sand S on the outer circumferential surface of the FRP reinforcing bar 10, When the FRP reinforcing bar 10 is discharged to the outside through the discharge end portion 111b, the rolling portion 120 presses the FRP reinforcing bar 10 more closely than the insertion end portion 111a, ) Can be secondarily coated.

The hollow tube inner circumferential surface 111c has a curved surface shape extending from the inner diameter of the insertion end 111a to the inner diameter of the discharge end 111b. In the hollow tube inner circumferential surface 111c, The member 121, the first support member 123, and the roller 127 are arranged radially.

4, the hollow tube outer circumferential surface 111d has a curved shape extending from the outer diameter of the insertion end 111a to the outer diameter of the discharge end 111b. On one side of the hollow tube outer circumferential surface 111d, A payment unit 130 may be installed.

The rolling part 120 is mounted inside the guide part 110 so as to be in parallel with the inner surface of the guide part 110. [ The rolling parts 120 are coated on the outer circumferential surface of the FRP reinforcing bar 10 by elastically pressing the outer circumferential surface of the FRP reinforcing bar 10 passing through the inside of the guide part 110 so as to be adjacent to each other, And homogenize the silica sand (S). The rolling unit 120 includes a first fixing member 121, a second fixing member 122, a first supporting member 123, a second supporting member 124, a first spring 125, 126 and a roller 127. [

As shown in FIG. 3, the first fixing member 121 has a hollow shape arranged in a plurality of rows along the inner circumferential surface 111c of the hollow tube. Further, the first fixing member 121 has different inner diameters as shown in Figs. 5 (a) and 5 (b). In this structure, the other end of the first supporting member 123 inserted into the first fixing member 121 is hooked on the upper portion of the first fixing member 121, thereby preventing the first supporting member 123 from falling to the outside And the upper limit of the elastic force provided to the first support member 123 can be determined accordingly.

As shown in FIG. 4, the second fixing member 122 is disposed in the same line as the first fixing member 121 and is spaced apart from the first fixing member 121 by a predetermined distance, ) And a hollow shape having different inner diameters. Since the second fixing member 122 has the same shape and function as the first fixing member 121, the first fixing member 121 is referred to.

In addition, the upper diameter of the first and second fixing members 121 and 122 is formed to be smaller than the lower diameter of the first and second fixing members 121 and 122.

The first fixing member 121 and the second fixing member 122 may be disposed perpendicular to the hollow tube inner circumferential surface 111c as shown in FIGS. 5 (a) and 5 (b) 2 The fixing members 121 and 122 are preferably made of a material having a low thermal conductivity. That is, the first and second supporting members 123 and 124 inserted into the first and second fixing members 121 and 122 are made of a material having a high thermal conductivity, and the heat source applied by the heat supply unit 130, The curing of the silica sand S in the roller 127 can be promoted only when it is completely transferred to the roller 127 through the first and second supporting members 123 and 124. [ That is, the loss of the heat source in the heat supply part 130 must be minimized so that the hardening of the silica sand S can be more effectively promoted.

As shown in FIG. 4, one end of the first fixing member 121 is fixed to one side of the roller 127, and the other end of the first fixing member 121 is inserted into the first fixing member 121, So that the roller 127 can be rotated.

4, the one end of the second fixing member 122 is in contact with the other side of the roller 127, and the other end of the second fixing member 122 is in contact with the second fixing member 122, So that the roller 127 can be rotated.

The diameter of the other end of the first and second support members 123 and 124 may be larger than the diameter of the center of the first and second support members 123 and 124, The upper limit of the elastic force provided by the first and second support members 123 and 124 is determined while preventing the first and second support members 123 and 124 from being separated from each other. That is, the range of the height at which the first and second support members 123 and 124 can be varied is determined.

The first spring 125 is located inside the first fixing member 121 and supports the other end of the first supporting member 123. 4, the first spring 125 includes a first support member 123 to allow the roller 127, which is in close contact with the FRP reinforcement bar 10 inserted into the hollow tube 111, to move in a variable manner, .

The second spring 126 is positioned inside the second fixing member 122 to support the other end of the second supporting member 124 as shown in FIG. The second spring 126 performs the same function as the first spring 125 so that the roller 127 that is in close contact with the FRP reinforcing bar 10 inserted into the hollow tube 111 can be moved 2 supporting member 124. [0054]

The first spring 125 and the second spring 126 are supported by the first support member 123 and the second support member 124 so that the roller 127 can be brought into close contact with the outer circumferential surface of the FRP reinforcing bar 10 By providing an elastic force, the roller 127 homogenizes the silica sand S on the outer peripheral surface of the FRP reinforcing bar 10.

The roller 127 is a cylinder-shaped rotating body, and one end of the first support member 123 and one end of the second support member 124 are inserted and rotated. More specifically, the corners at both ends of the roller 127 are rounded in a curved shape as shown in Fig. The rounding structure of the roller 127 is such that the FRP reinforcing bar 10 is inserted into the hollow pipe 111 and closely contacted with the roller 127 so that the silica sand S on the outer circumferential surface of the FRP reinforcing bar 10 Can be minimized.

Grooves (not shown) are respectively formed at both ends of the center of the roller 127. One end of each of the first and second support members 123 and 124 is inserted into a groove formed at both ends of the roller 127 so that the roller 127 can be rotated.

The roller 127 and the first and second support members 123 and 124 are made of a material having a high thermal conductivity and the effect thereof will be described concretely through the heat supply part 130 described later.

The hardening promoting device 100 for silica sand coating has a heat radiating portion 130 mounted on the hollow tube outer circumferential surface 111d and a heat source 130 for electrically connecting the first and second support members 123 and 124 to the heat radiating portion 130. [ And may further include a connection portion 140.

The heat radiating part 130 is an apparatus or a device for generating heat, and a typical example of the heat radiating part 130 is a heater. Although it has been described in the present invention that the heat is supplied to the roller 127 through the heat supply part 130, the material of the roller 127 may be made of a material having high electrical resistance, and the heat supply part 130 may be connected to a power supply part ) May be applied.

The heat radiating portion 130 promotes the curing of the silica sand S on the outer peripheral surface of the FRP reinforcing bar 10 by transmitting the heat source to the roller 127.

The heat source connection portion 140 is a medium for transferring heat by connecting the first and second support members 123 and 124 and the heat supply portion 130, and is preferably in the form of a wire having high thermal conductivity.

[FRP manufactured by using hardening accelerator for silica sand coating Rebar ]

FIG. 7 is a view showing a state after the FRP reinforcement bars are inserted into the inside of the curing accelerating device for covering silica sand according to the embodiment of the present invention. FIG.

That is, in the curing promoting device 100 for silica sand coating according to the embodiment of the present invention, a plurality of rolling parts 120 arranged in the hollow tube 111 are inserted into the FRP reinforcement rope 10, The silica sand S on the outer circumferential surface of the FRP reinforcing bar 10 can be homogenized and coated as it moves so as to be in close contact with the outer circumferential surface of the reinforcing bar 10.

At this time, when the work is performed while rotating the hardening promoting device 100 for sandpaper coating and the FRP reinforcing bars 10 in different directions, the homogenizing efficiency of the silica sand S on the outer peripheral surface of the FRP reinforcing bars 10 is doubled So that the homogeneous silica sand S 'can be coated on the outer peripheral surface of the FRP barb 10 as shown in FIG.

It will be understood by those skilled in the art that the foregoing description of the present invention is for illustrative purposes only and that those of ordinary skill in the art can readily understand that various changes and modifications may be made without departing from the spirit or essential characteristics of the present invention. will be. It is therefore to be understood that the above-described embodiments are illustrative in all aspects and not restrictive. For example, each component described as a single entity may be distributed and implemented, and components described as being distributed may also be implemented in a combined form.

The scope of the present invention is defined by the appended claims rather than the detailed description and all changes or modifications derived from the meaning and scope of the claims and their equivalents are to be construed as being included within the scope of the present invention do.

10: FRP rebar
100: Curing accelerator for silica sand coating
110:
111: hollow tube
111a: insertion end portion 111b:
111c: hollow tube inner peripheral surface 111d: hollow tube outer peripheral surface
120:
121: first fixing member
122: second fixing member
123: first supporting member
124: second supporting member
125: first spring
126: Second spring
127: Rollers
130:
140: heat source connection part

Claims (11)

A guide portion opened on both sides; And
And a rolling part mounted inside the guide part so as to be in parallel with the inner surface of the guide part,
Wherein the guide portion is a truncated hollow tube having an empty interior,
In the hollow tube,
An insertion end formed at one end of the hollow tube so as to insert the FRP reinforcing bars; And
And a discharge end formed at the other end of the hollow tube so as to face the insertion end,
The diameter of the insertion end being greater than the diameter of the exit end,
Wherein the plurality of rolling parts are arranged to be adjacent to each other and elastically press the outer circumferential surface of the FRP reinforcing bar passing through the inside of the guide part to homogenize the silica sand S coated on the outer circumferential surface of the FRP reinforcing bar. Curing accelerators for coatings.
delete The method according to claim 1,
In the hollow tube,
A curved hollow tube inner circumferential surface extending from an inner diameter of the insertion end to an inner diameter of the discharge end; And
And a curved hollow tube outer circumferential surface extending from an outer diameter of the insertion end to an outer diameter of the discharge end.
The method of claim 3,
The rolling unit includes:
A hollow first fixing member having a plurality of different inner diameters and arranged along the inner circumferential surface of the hollow tube;
A second hollow fixing member disposed on the same line as the first fixing member and spaced apart from the first fixing member by a predetermined distance and having a different inner diameter;
A first support member having a '''shape and a part of which is inserted into the first fixing member;
A second support member having a '''shape and partially inserted into the second fixing member; And
And a roller having one end of the first support member and one end of the second support member inserted and rotating,
Wherein the first fixing member and the second fixing member are disposed perpendicularly to the inner circumferential surface of the hollow tube.
5. The method of claim 4,
Wherein the roller and the first and second support members are made of a material having a high thermal conductivity,
Wherein the first and second fixing members are made of a material having a low thermal conductivity.
5. The method of claim 4,
The rolling unit includes:
A first spring positioned inside the first fixing member and supporting the other end of the first supporting member; And
And a second spring located inside the second fixing member and supporting the other end of the second support member,
Wherein the first spring and the second spring provide an elastic force to the first and second support members so that the roller can be in intimate contact with the outer circumferential surface of the FRP reinforcement, Characterized in that the silica sand (S) is homogenized.
5. The method of claim 4,
The above-mentioned curing accelerating device for coating silica sand,
A thermal hole mounted on the outer circumferential surface of the hollow tube; And
And a heat source connection portion for electrically connecting the first and second support members and the heat supply unit,
Wherein the heat supply unit promotes the curing of the silica sand (S) on the outer peripheral surface of the FRP reinforcing bar by applying a heat source to the roller.
5. The method of claim 4,
Wherein an upper diameter of the first and second fixing members is smaller than a lower diameter of the first and second fixing members.
The method according to claim 6,
Wherein the diameter of the other end of the first and second support members is larger than the diameter of the center of the first and second support members.
5. The method of claim 4,
Wherein edges of both ends of the roller are rounded in a curved shape.
A guide portion opened on both sides; And a rolling part mounted in the guide part so as to be in parallel with an inner surface of the guide part, wherein the guide part is a truncated cone-shaped hollow tube having an inside hollowed out, An insertion end formed at one end; And a discharge end portion formed at the other end of the hollow tube so as to face the insertion end portion, wherein the diameter of the insertion end portion is larger than the diameter of the discharge end portion, and the rolling portions are arranged to be adjacent to each other, (100) for elastically pressing the outer peripheral surface of the FRP reinforcing bar passing through the inside of the guide portion
The FRP reinforcement bars made by using the hardening promoting device for sanding and coating so that the rolling parts are passed through the FRP reinforcing bars coated on the outer circumferential surface of the sand paper S to homogenize the sandpaper.
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Cited By (4)

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Publication number Priority date Publication date Assignee Title
KR102480645B1 (en) 2022-07-26 2022-12-23 주식회사 지바산업 Device for manufacturing glass fiber reinforcing material
KR102589369B1 (en) * 2022-09-13 2023-10-16 주식회사 티에스머티리얼즈 Reinforcing bar manufacturing apparatus
KR102609444B1 (en) 2023-10-10 2023-12-04 주식회사 디엘 Device for silica coating of GFRP reinforcement and method of silica coating using the device
KR102670186B1 (en) * 2024-02-15 2024-05-29 삼우기업 주식회사 Impregnated leakage resin handling apparatus for glass fiber reinforced plastic rebars

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JPH08270884A (en) * 1995-03-31 1996-10-15 Nkk Corp Coat pressurizing device
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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102480645B1 (en) 2022-07-26 2022-12-23 주식회사 지바산업 Device for manufacturing glass fiber reinforcing material
KR102589369B1 (en) * 2022-09-13 2023-10-16 주식회사 티에스머티리얼즈 Reinforcing bar manufacturing apparatus
KR102609444B1 (en) 2023-10-10 2023-12-04 주식회사 디엘 Device for silica coating of GFRP reinforcement and method of silica coating using the device
KR102670186B1 (en) * 2024-02-15 2024-05-29 삼우기업 주식회사 Impregnated leakage resin handling apparatus for glass fiber reinforced plastic rebars

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